From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jingoo Han Subject: Re: [PATCH V2 1/9] drm/exynos: dp: support hotplug detection via GPIO Date: Tue, 22 Apr 2014 16:13:54 +0900 Message-ID: <001901cf5dfa$6bcda480$4368ed80$%han@samsung.com> References: <1398119958-32005-1-git-send-email-ajaykumar.rs@samsung.com> <1398119958-32005-2-git-send-email-ajaykumar.rs@samsung.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <1398119958-32005-2-git-send-email-ajaykumar.rs@samsung.com> Content-language: ko List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: 'Ajay Kumar' Cc: linux-samsung-soc@vger.kernel.org, seanpaul@google.com, 'Andrew Bresticker' , joshi@samsung.com, dri-devel@lists.freedesktop.org, ajaynumb@gmail.com, prashanth.g@samsung.com, 'Rahul Sharma' List-Id: linux-samsung-soc@vger.kernel.org On Tuesday, April 22, 2014 7:39 AM, Ajay Kumar wrote: > > From: Andrew Bresticker > > Certain bridge chips use a GPIO to indicate the cable status instead > of the I_DP_HPD pin. This adds an optional device-tree property, > "samsung,hpd-gpio", to the exynos-dp controller which indicates that > the specified GPIO should be used for hotplug detection. > The GPIO is then set up as an edge-triggered interrupt where the > rising edge indicates hotplug-in and the falling edge indicates hotplug-out. > > Signed-off-by: Andrew Bresticker > Signed-off-by: Rahul Sharma > Signed-off-by: Ajay Kumar Acked-by: Jingoo Han Best regards, Jingoo Han > --- > Changes since V1: > Address reiew comments from Jingoo Han > > .../devicetree/bindings/video/exynos_dp.txt | 4 ++ > drivers/gpu/drm/exynos/exynos_dp_core.c | 32 ++++++++++++-- > drivers/gpu/drm/exynos/exynos_dp_core.h | 1 + > drivers/gpu/drm/exynos/exynos_dp_reg.c | 44 ++++++++++++++------ > 4 files changed, 66 insertions(+), 15 deletions(-) [.....]